diff --git a/scripts/qapi.py b/scripts/qapi.py
index 868f08b..6a339d6 100644
--- a/scripts/qapi.py
+++ b/scripts/qapi.py
@@ -32,6 +32,12 @@
     'size':     'QTYPE_QINT',
 }
 
+enum_types = []
+struct_types = []
+union_types = []
+events = []
+all_names = {}
+
 def error_path(parent):
     res = ""
     while parent:
@@ -256,7 +262,14 @@
     return find_enum(discriminator_type)
 
 def check_event(expr, expr_info):
+    global events
+    name = expr['event']
     params = expr.get('data')
+
+    if name.upper() == 'MAX':
+        raise QAPIExprError(expr_info, "Event name 'MAX' cannot be created")
+    events.append(name)
+
     if params:
         for argname, argentry, optional, structured in parse_args(params):
             if structured:
@@ -430,6 +443,9 @@
 
 
 def parse_schema(input_file):
+    global all_names
+    exprs = []
+
     # First pass: read entire file into memory
     try:
         schema = QAPISchema(open(input_file, "r"))
@@ -437,30 +453,34 @@
         print >>sys.stderr, e
         exit(1)
 
-    exprs = []
-
     try:
         # Next pass: learn the types and check for valid expression keys. At
         # this point, top-level 'include' has already been flattened.
+        for builtin in builtin_types.keys():
+            all_names[builtin] = 'built-in'
         for expr_elem in schema.exprs:
             expr = expr_elem['expr']
+            info = expr_elem['info']
             if expr.has_key('enum'):
                 check_keys(expr_elem, 'enum', ['data'])
-                add_enum(expr['enum'], expr['data'])
+                add_enum(expr['enum'], info, expr['data'])
             elif expr.has_key('union'):
                 check_keys(expr_elem, 'union', ['data'],
                            ['base', 'discriminator'])
-                add_union(expr)
+                add_union(expr, info)
             elif expr.has_key('alternate'):
                 check_keys(expr_elem, 'alternate', ['data'])
+                add_name(expr['alternate'], info, 'alternate')
             elif expr.has_key('type'):
                 check_keys(expr_elem, 'type', ['data'], ['base'])
-                add_struct(expr)
+                add_struct(expr, info)
             elif expr.has_key('command'):
                 check_keys(expr_elem, 'command', [],
                            ['data', 'returns', 'gen', 'success-response'])
+                add_name(expr['command'], info, 'command')
             elif expr.has_key('event'):
                 check_keys(expr_elem, 'event', [], ['data'])
+                add_name(expr['event'], info, 'event')
             else:
                 raise QAPIExprError(expr_elem['info'],
                                     "Expression is missing metatype")
@@ -471,9 +491,11 @@
             expr = expr_elem['expr']
             if expr.has_key('union'):
                 if not discriminator_find_enum_define(expr):
-                    add_enum('%sKind' % expr['union'])
+                    add_enum('%sKind' % expr['union'], expr_elem['info'],
+                             implicit=True)
             elif expr.has_key('alternate'):
-                add_enum('%sKind' % expr['alternate'])
+                add_enum('%sKind' % expr['alternate'], expr_elem['info'],
+                         implicit=True)
 
         # Final pass - validate that exprs make sense
         check_exprs(schema)
@@ -567,12 +589,22 @@
         return c_list_type(name[0])
     return name
 
-enum_types = []
-struct_types = []
-union_types = []
+def add_name(name, info, meta, implicit = False):
+    global all_names
+    if name in all_names:
+        raise QAPIExprError(info,
+                            "%s '%s' is already defined"
+                            % (all_names[name], name))
+    if not implicit and name[-4:] == 'Kind':
+        raise QAPIExprError(info,
+                            "%s '%s' should not end in 'Kind'"
+                            % (meta, name))
+    all_names[name] = meta
 
-def add_struct(definition):
+def add_struct(definition, info):
     global struct_types
+    name = definition['type']
+    add_name(name, info, 'struct')
     struct_types.append(definition)
 
 def find_struct(name):
@@ -582,8 +614,10 @@
             return struct
     return None
 
-def add_union(definition):
+def add_union(definition, info):
     global union_types
+    name = definition['union']
+    add_name(name, info, 'union')
     union_types.append(definition)
 
 def find_union(name):
@@ -593,8 +627,9 @@
             return union
     return None
 
-def add_enum(name, enum_values = None):
+def add_enum(name, info, enum_values = None, implicit = False):
     global enum_types
+    add_name(name, info, 'enum', implicit)
     enum_types.append({"enum_name": name, "enum_values": enum_values})
 
 def find_enum(name):
@@ -636,7 +671,7 @@
         return name
     elif name == None or len(name) == 0:
         return 'void'
-    elif name == name.upper():
+    elif name in events:
         return '%sEvent *%s' % (camel_case(name), eatspace)
     else:
         return '%s *%s' % (name, eatspace)
diff --git a/tests/qapi-schema/command-int.err b/tests/qapi-schema/command-int.err
index e69de29..0f93006 100644
--- a/tests/qapi-schema/command-int.err
+++ b/tests/qapi-schema/command-int.err
@@ -0,0 +1 @@
+tests/qapi-schema/command-int.json:2: built-in 'int' is already defined
diff --git a/tests/qapi-schema/command-int.exit b/tests/qapi-schema/command-int.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/command-int.exit
+++ b/tests/qapi-schema/command-int.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/command-int.json b/tests/qapi-schema/command-int.json
index fcbb643..c90d408 100644
--- a/tests/qapi-schema/command-int.json
+++ b/tests/qapi-schema/command-int.json
@@ -1,3 +1,3 @@
-# FIXME: we should reject collisions between commands and types
+# we reject collisions between commands and types
 { 'command': 'int', 'data': { 'character': 'str' },
   'returns': { 'value': 'int' } }
diff --git a/tests/qapi-schema/command-int.out b/tests/qapi-schema/command-int.out
index d8e1854..e69de29 100644
--- a/tests/qapi-schema/command-int.out
+++ b/tests/qapi-schema/command-int.out
@@ -1,3 +0,0 @@
-[OrderedDict([('command', 'int'), ('data', OrderedDict([('character', 'str')])), ('returns', OrderedDict([('value', 'int')]))])]
-[]
-[]
diff --git a/tests/qapi-schema/enum-union-clash.err b/tests/qapi-schema/enum-union-clash.err
index e69de29..c04e1a8 100644
--- a/tests/qapi-schema/enum-union-clash.err
+++ b/tests/qapi-schema/enum-union-clash.err
@@ -0,0 +1 @@
+tests/qapi-schema/enum-union-clash.json:2: enum 'UnionKind' should not end in 'Kind'
diff --git a/tests/qapi-schema/enum-union-clash.exit b/tests/qapi-schema/enum-union-clash.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/enum-union-clash.exit
+++ b/tests/qapi-schema/enum-union-clash.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/enum-union-clash.json b/tests/qapi-schema/enum-union-clash.json
index 714ff6d..593282b 100644
--- a/tests/qapi-schema/enum-union-clash.json
+++ b/tests/qapi-schema/enum-union-clash.json
@@ -1,4 +1,4 @@
-# FIXME: we should reject types that would conflict with implicit union enum
+# we reject types that would conflict with implicit union enum
 { 'enum': 'UnionKind', 'data': [ 'oops' ] }
 { 'union': 'Union',
   'data': { 'a': 'int' } }
diff --git a/tests/qapi-schema/enum-union-clash.out b/tests/qapi-schema/enum-union-clash.out
index d45f5e8..e69de29 100644
--- a/tests/qapi-schema/enum-union-clash.out
+++ b/tests/qapi-schema/enum-union-clash.out
@@ -1,5 +0,0 @@
-[OrderedDict([('enum', 'UnionKind'), ('data', ['oops'])]),
- OrderedDict([('union', 'Union'), ('data', OrderedDict([('a', 'int')]))])]
-[{'enum_name': 'UnionKind', 'enum_values': ['oops']},
- {'enum_name': 'UnionKind', 'enum_values': None}]
-[]
diff --git a/tests/qapi-schema/event-max.err b/tests/qapi-schema/event-max.err
index e69de29..c856534 100644
--- a/tests/qapi-schema/event-max.err
+++ b/tests/qapi-schema/event-max.err
@@ -0,0 +1 @@
+tests/qapi-schema/event-max.json:2: Event name 'MAX' cannot be created
diff --git a/tests/qapi-schema/event-max.exit b/tests/qapi-schema/event-max.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/event-max.exit
+++ b/tests/qapi-schema/event-max.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/event-max.json b/tests/qapi-schema/event-max.json
index 997c61c..f3d7de2 100644
--- a/tests/qapi-schema/event-max.json
+++ b/tests/qapi-schema/event-max.json
@@ -1,2 +1,2 @@
-# FIXME: an event named 'MAX' would conflict with implicit C enum
+# an event named 'MAX' would conflict with implicit C enum
 { 'event': 'MAX' }
diff --git a/tests/qapi-schema/event-max.out b/tests/qapi-schema/event-max.out
index 010c42b..e69de29 100644
--- a/tests/qapi-schema/event-max.out
+++ b/tests/qapi-schema/event-max.out
@@ -1,3 +0,0 @@
-[OrderedDict([('event', 'MAX')])]
-[]
-[]
diff --git a/tests/qapi-schema/redefined-builtin.err b/tests/qapi-schema/redefined-builtin.err
index e69de29..b275722 100644
--- a/tests/qapi-schema/redefined-builtin.err
+++ b/tests/qapi-schema/redefined-builtin.err
@@ -0,0 +1 @@
+tests/qapi-schema/redefined-builtin.json:2: built-in 'size' is already defined
diff --git a/tests/qapi-schema/redefined-builtin.exit b/tests/qapi-schema/redefined-builtin.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/redefined-builtin.exit
+++ b/tests/qapi-schema/redefined-builtin.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/redefined-builtin.json b/tests/qapi-schema/redefined-builtin.json
index a10050d..df328cc 100644
--- a/tests/qapi-schema/redefined-builtin.json
+++ b/tests/qapi-schema/redefined-builtin.json
@@ -1,2 +1,2 @@
-# FIXME: we should reject types that duplicate builtin names
+# we reject types that duplicate builtin names
 { 'type': 'size', 'data': { 'myint': 'size' } }
diff --git a/tests/qapi-schema/redefined-builtin.out b/tests/qapi-schema/redefined-builtin.out
index b0a9aea..e69de29 100644
--- a/tests/qapi-schema/redefined-builtin.out
+++ b/tests/qapi-schema/redefined-builtin.out
@@ -1,3 +0,0 @@
-[OrderedDict([('type', 'size'), ('data', OrderedDict([('myint', 'size')]))])]
-[]
-[OrderedDict([('type', 'size'), ('data', OrderedDict([('myint', 'size')]))])]
diff --git a/tests/qapi-schema/redefined-command.err b/tests/qapi-schema/redefined-command.err
index e69de29..82ae256 100644
--- a/tests/qapi-schema/redefined-command.err
+++ b/tests/qapi-schema/redefined-command.err
@@ -0,0 +1 @@
+tests/qapi-schema/redefined-command.json:3: command 'foo' is already defined
diff --git a/tests/qapi-schema/redefined-command.exit b/tests/qapi-schema/redefined-command.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/redefined-command.exit
+++ b/tests/qapi-schema/redefined-command.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/redefined-command.json b/tests/qapi-schema/redefined-command.json
index d8c9975..247e401 100644
--- a/tests/qapi-schema/redefined-command.json
+++ b/tests/qapi-schema/redefined-command.json
@@ -1,3 +1,3 @@
-# FIXME: we should reject commands defined more than once
+# we reject commands defined more than once
 { 'command': 'foo', 'data': { 'one': 'str' } }
 { 'command': 'foo', 'data': { '*two': 'str' } }
diff --git a/tests/qapi-schema/redefined-command.out b/tests/qapi-schema/redefined-command.out
index 44ddba6..e69de29 100644
--- a/tests/qapi-schema/redefined-command.out
+++ b/tests/qapi-schema/redefined-command.out
@@ -1,4 +0,0 @@
-[OrderedDict([('command', 'foo'), ('data', OrderedDict([('one', 'str')]))]),
- OrderedDict([('command', 'foo'), ('data', OrderedDict([('*two', 'str')]))])]
-[]
-[]
diff --git a/tests/qapi-schema/redefined-event.err b/tests/qapi-schema/redefined-event.err
index e69de29..35429cb 100644
--- a/tests/qapi-schema/redefined-event.err
+++ b/tests/qapi-schema/redefined-event.err
@@ -0,0 +1 @@
+tests/qapi-schema/redefined-event.json:3: event 'EVENT_A' is already defined
diff --git a/tests/qapi-schema/redefined-event.exit b/tests/qapi-schema/redefined-event.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/redefined-event.exit
+++ b/tests/qapi-schema/redefined-event.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/redefined-event.json b/tests/qapi-schema/redefined-event.json
index 152cce7..7717e91 100644
--- a/tests/qapi-schema/redefined-event.json
+++ b/tests/qapi-schema/redefined-event.json
@@ -1,3 +1,3 @@
-# FIXME: we should reject duplicate events
+# we reject duplicate events
 { 'event': 'EVENT_A', 'data': { 'myint': 'int' } }
 { 'event': 'EVENT_A', 'data': { 'myint': 'int' } }
diff --git a/tests/qapi-schema/redefined-event.out b/tests/qapi-schema/redefined-event.out
index 261b183..e69de29 100644
--- a/tests/qapi-schema/redefined-event.out
+++ b/tests/qapi-schema/redefined-event.out
@@ -1,4 +0,0 @@
-[OrderedDict([('event', 'EVENT_A'), ('data', OrderedDict([('myint', 'int')]))]),
- OrderedDict([('event', 'EVENT_A'), ('data', OrderedDict([('myint', 'int')]))])]
-[]
-[]
diff --git a/tests/qapi-schema/redefined-type.err b/tests/qapi-schema/redefined-type.err
index e69de29..06ea78c 100644
--- a/tests/qapi-schema/redefined-type.err
+++ b/tests/qapi-schema/redefined-type.err
@@ -0,0 +1 @@
+tests/qapi-schema/redefined-type.json:3: struct 'foo' is already defined
diff --git a/tests/qapi-schema/redefined-type.exit b/tests/qapi-schema/redefined-type.exit
index 573541a..d00491f 100644
--- a/tests/qapi-schema/redefined-type.exit
+++ b/tests/qapi-schema/redefined-type.exit
@@ -1 +1 @@
-0
+1
diff --git a/tests/qapi-schema/redefined-type.json b/tests/qapi-schema/redefined-type.json
index 7972194..e6a5f24 100644
--- a/tests/qapi-schema/redefined-type.json
+++ b/tests/qapi-schema/redefined-type.json
@@ -1,3 +1,3 @@
-# FIXME: we should reject types defined more than once
+# we reject types defined more than once
 { 'type': 'foo', 'data': { 'one': 'str' } }
 { 'enum': 'foo', 'data': [ 'two' ] }
diff --git a/tests/qapi-schema/redefined-type.out b/tests/qapi-schema/redefined-type.out
index b509e57..e69de29 100644
--- a/tests/qapi-schema/redefined-type.out
+++ b/tests/qapi-schema/redefined-type.out
@@ -1,4 +0,0 @@
-[OrderedDict([('type', 'foo'), ('data', OrderedDict([('one', 'str')]))]),
- OrderedDict([('enum', 'foo'), ('data', ['two'])])]
-[{'enum_name': 'foo', 'enum_values': ['two']}]
-[OrderedDict([('type', 'foo'), ('data', OrderedDict([('one', 'str')]))])]